This is a list of the mammal species recorded in Papua New Guinea. There are 244 mammal species in Papua New Guinea, of which seven are critically endangered, twelve are endangered and forty are vulnerable.^[1]

The following tags are used to highlight each species' conservation status as assessed by the International Union for Conservation of Nature:

Some species were assessed using an earlier set of criteria. Species assessed using this system have the following instead of near threatened and least concern categories:

• Fauna of New Guinea
• List of chordate orders
• Lists of mammals by region
• List of prehistoric mammals
• Mammal classification
• List of mammals described in the 2000s